1 files changed, 85 insertions, 0 deletions
diff --git a/xbmc/rendering/MatrixGL.h b/xbmc/rendering/MatrixGL.h
new file mode 100644
index 0000000..333da2f
--- /dev/null
+++ b/xbmc/rendering/MatrixGL.h
@@ -0,0 +1,85 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include <stack>
+
+#include "system_gl.h"
+
+class TransformMatrix;
+
+class CMatrixGL
+{
+public:
+  CMatrixGL() = default;
+
+  constexpr CMatrixGL(GLfloat x0, GLfloat x1, GLfloat x2, GLfloat x3,
+                      GLfloat x4, GLfloat x5, GLfloat x6, GLfloat x7,
+                      GLfloat x8, GLfloat x9, GLfloat x10, GLfloat x11,
+                      GLfloat x12, GLfloat x13, GLfloat x14, GLfloat x15)
+    :m_pMatrix{x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15} {}
+
+  CMatrixGL(const TransformMatrix &src) noexcept;
+
+  operator const float*() const                { return m_pMatrix; }
+
+  void LoadIdentity();
+  void Ortho(GLfloat l, GLfloat r, GLfloat b, GLfloat t, GLfloat n, GLfloat f);
+  void Ortho2D(GLfloat l, GLfloat r, GLfloat b, GLfloat t);
+  void Frustum(GLfloat l, GLfloat r, GLfloat b, GLfloat t, GLfloat n, GLfloat f);
+  void Translatef(GLfloat x, GLfloat y, GLfloat z);
+  void Scalef(GLfloat x, GLfloat y, GLfloat z);
+  void Rotatef(GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
+  void MultMatrixf(const CMatrixGL &matrix) noexcept;
+  void LookAt(GLfloat eyex, GLfloat eyey, GLfloat eyez, GLfloat centerx, GLfloat centery, GLfloat centerz, GLfloat upx, GLfloat upy, GLfloat upz);
+
+  static bool Project(GLfloat objx, GLfloat objy, GLfloat objz, const GLfloat modelMatrix[16], const GLfloat projMatrix[16], const GLint viewport[4], GLfloat* winx, GLfloat* winy, GLfloat* winz);
+
+private:
+  /* alignas(16) allows better SIMD optimizations (e.g. SSE2 benefits
+     a lot from this) */
+  alignas(16) GLfloat m_pMatrix[16];
+};
+
+class CMatrixGLStack
+{
+public:
+  void Push()
+  {
+    m_stack.push(m_current);
+  }
+
+  void Clear()
+  {
+    m_stack = std::stack<CMatrixGL>();
+  }
+
+  void Pop()
+  {
+    if(!m_stack.empty())
+    {
+      m_current = m_stack.top();
+      m_stack.pop();
+    }
+  }
+
+  void Load();
+  void PopLoad() { Pop(); Load(); }
+
+  CMatrixGL& Get()        { return m_current; }
+  CMatrixGL* operator->() { return &m_current; }
+
+private:
+  std::stack<CMatrixGL> m_stack;
+  CMatrixGL             m_current;
+};
+
+extern CMatrixGLStack glMatrixModview;
+extern CMatrixGLStack glMatrixProject;
+extern CMatrixGLStack glMatrixTexture;